The pivoting, self-steering headlight of Preston Tucker’s legendary 1948 car (only 51 were built) may be coming back, but using a very different technology.与他使用的Tucker鱼雷的机械连接不同,,,,德州仪器使用其专有数字照明投影仪(DLP)技术宣布了一种基于MEMS的方法(图。1)。这是MEMS技术应用于车辆中许多不同角色的另一个例子,这种趋势始于安全气囊冲击传感器,扩展到加速度计进行滚动检测,现在用于陀螺仪和加速度计用于导航IMUS(惯性测量单元)。
介绍了在国际消费电子展上,TI的DLP5531-Q1 DLP芯片steerable headlight systems offers full programmability along with high resolution of more than one million addressable pixels per headlight—a figure which exceeds the resolution of existing adaptive driving beam (ADB) technologies by more than four orders of magnitude. It is targeted at enabling headlight systems that maximize brightness for drivers on the road while minimizing the glare to oncoming traffic or reflections from retroreflective traffic signs. Further, as a passive reflecting-mirror approach, it can be used with any light source, including LED and laser illumination, thus giving engineers a way to more precisely control light distribution on the road with customizable beam patterns.
正如DLP芯片组的这张简化的框图所示,完整的DLP系统比其核心的数字微龙数阵列还需要更多。(来源:德州仪器)
DLP技术,,,,introduced in 1996, consists of an array of highly reflective aluminum micromirrors forming a digital micromirror device (DMD); each such device contains up to 8 million individually controlled micromirrors built on top of an associated CMOS memory cell. This electrical-input, optical-output MEMS device is used as a high-speed, efficient, and reliable spatial light modulator. The micromirrors are individually tilted via electrostatic deflection to steer imping light, transitioning between hard stops at two angles of either ±12° or ±17°, depending on the selected DMD. The switching rate of the micromirrors can range up to 10,000 times per second. A complete chipset consists of the DMD, driver, support circuitry, and processor(图2)。
在詹姆斯·伯克(James Burke)的洞察力和发人深省,发人深省的,1978年,使用DLP技术用于汽车自适应驾驶光束实施,这是创新寻找新应用的另一个例子,通常充当最初意图的基础。电视连续剧和书籍连接。DLP最初被设想为视频投影技术的核心,现在用于大型剧院系统和手持式皮科注射器。它还被设计成主抬高显示器(HUD),以及车辆和飞机,3D打印机,甚至是光谱仪等科学仪器。
但是,自适应驾驶梁设计并不是顶级原始应用列表,但DLP被证明是解决此应用程序挑战的有吸引力的解决方案,这也要求组件达到严格的汽车标准,尽管温度严重,振动,电气电气,但瞬态和其他条件。ti说,主要客户已经使用DLP5531-Q1芯片组进行了采样和设计,用于高分辨率大灯系统。该芯片组将在2018年下半年更广泛。